The V-formation group is a term used to describe a group of birds, usually GEESE, flying in a V-shaped formation. The term can also be used to refer to a group of people or things arranged in a similar pattern. GEESE fly in a V-formation to reduce air resistance and conserve energy. A SKEIN is a flock of GEESE flying in a V-formation. A SQUADRON is a large group of aircraft, ships, or other military units that are organized and trained for a specific purpose.